12bad8471SEric Van Hensbergen /* 22bad8471SEric Van Hensbergen * linux/fs/9p/vfs_inode.c 32bad8471SEric Van Hensbergen * 473c592b9SEric Van Hensbergen * This file contains vfs inode ops for the 9P2000 protocol. 52bad8471SEric Van Hensbergen * 62bad8471SEric Van Hensbergen * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 72bad8471SEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 82bad8471SEric Van Hensbergen * 92bad8471SEric Van Hensbergen * This program is free software; you can redistribute it and/or modify 1042e8c509SEric Van Hensbergen * it under the terms of the GNU General Public License version 2 1142e8c509SEric Van Hensbergen * as published by the Free Software Foundation. 122bad8471SEric Van Hensbergen * 132bad8471SEric Van Hensbergen * This program is distributed in the hope that it will be useful, 142bad8471SEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 152bad8471SEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 162bad8471SEric Van Hensbergen * GNU General Public License for more details. 172bad8471SEric Van Hensbergen * 182bad8471SEric Van Hensbergen * You should have received a copy of the GNU General Public License 192bad8471SEric Van Hensbergen * along with this program; if not, write to: 202bad8471SEric Van Hensbergen * Free Software Foundation 212bad8471SEric Van Hensbergen * 51 Franklin Street, Fifth Floor 222bad8471SEric Van Hensbergen * Boston, MA 02111-1301 USA 232bad8471SEric Van Hensbergen * 242bad8471SEric Van Hensbergen */ 252bad8471SEric Van Hensbergen 262bad8471SEric Van Hensbergen #include <linux/module.h> 272bad8471SEric Van Hensbergen #include <linux/errno.h> 282bad8471SEric Van Hensbergen #include <linux/fs.h> 292bad8471SEric Van Hensbergen #include <linux/file.h> 302bad8471SEric Van Hensbergen #include <linux/pagemap.h> 312bad8471SEric Van Hensbergen #include <linux/stat.h> 322bad8471SEric Van Hensbergen #include <linux/string.h> 332bad8471SEric Van Hensbergen #include <linux/inet.h> 342bad8471SEric Van Hensbergen #include <linux/namei.h> 352bad8471SEric Van Hensbergen #include <linux/idr.h> 36e8edc6e0SAlexey Dobriyan #include <linux/sched.h> 37bd238fb4SLatchesar Ionkov #include <net/9p/9p.h> 38bd238fb4SLatchesar Ionkov #include <net/9p/client.h> 392bad8471SEric Van Hensbergen 402bad8471SEric Van Hensbergen #include "v9fs.h" 412bad8471SEric Van Hensbergen #include "v9fs_vfs.h" 422bad8471SEric Van Hensbergen #include "fid.h" 4360e78d2cSAbhishek Kulkarni #include "cache.h" 442bad8471SEric Van Hensbergen 45754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations; 46754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext; 47754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations; 48754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations; 492bad8471SEric Van Hensbergen 502bad8471SEric Van Hensbergen /** 512bad8471SEric Van Hensbergen * unixmode2p9mode - convert unix mode bits to plan 9 522bad8471SEric Van Hensbergen * @v9ses: v9fs session information 532bad8471SEric Van Hensbergen * @mode: mode to convert 542bad8471SEric Van Hensbergen * 552bad8471SEric Van Hensbergen */ 562bad8471SEric Van Hensbergen 5773c592b9SEric Van Hensbergen static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) 582bad8471SEric Van Hensbergen { 592bad8471SEric Van Hensbergen int res; 602bad8471SEric Van Hensbergen res = mode & 0777; 612bad8471SEric Van Hensbergen if (S_ISDIR(mode)) 62bd238fb4SLatchesar Ionkov res |= P9_DMDIR; 632405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 642bad8471SEric Van Hensbergen if (S_ISLNK(mode)) 65bd238fb4SLatchesar Ionkov res |= P9_DMSYMLINK; 662bad8471SEric Van Hensbergen if (v9ses->nodev == 0) { 672bad8471SEric Van Hensbergen if (S_ISSOCK(mode)) 68bd238fb4SLatchesar Ionkov res |= P9_DMSOCKET; 692bad8471SEric Van Hensbergen if (S_ISFIFO(mode)) 70bd238fb4SLatchesar Ionkov res |= P9_DMNAMEDPIPE; 712bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 72bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 732bad8471SEric Van Hensbergen if (S_ISCHR(mode)) 74bd238fb4SLatchesar Ionkov res |= P9_DMDEVICE; 752bad8471SEric Van Hensbergen } 762bad8471SEric Van Hensbergen 772bad8471SEric Van Hensbergen if ((mode & S_ISUID) == S_ISUID) 78bd238fb4SLatchesar Ionkov res |= P9_DMSETUID; 792bad8471SEric Van Hensbergen if ((mode & S_ISGID) == S_ISGID) 80bd238fb4SLatchesar Ionkov res |= P9_DMSETGID; 81d199d652SAnthony Liguori if ((mode & S_ISVTX) == S_ISVTX) 82d199d652SAnthony Liguori res |= P9_DMSETVTX; 83bd238fb4SLatchesar Ionkov if ((mode & P9_DMLINK)) 84bd238fb4SLatchesar Ionkov res |= P9_DMLINK; 852bad8471SEric Van Hensbergen } 862bad8471SEric Van Hensbergen 872bad8471SEric Van Hensbergen return res; 882bad8471SEric Van Hensbergen } 892bad8471SEric Van Hensbergen 902bad8471SEric Van Hensbergen /** 912bad8471SEric Van Hensbergen * p9mode2unixmode- convert plan9 mode bits to unix mode bits 922bad8471SEric Van Hensbergen * @v9ses: v9fs session information 932bad8471SEric Van Hensbergen * @mode: mode to convert 942bad8471SEric Van Hensbergen * 952bad8471SEric Van Hensbergen */ 962bad8471SEric Van Hensbergen 9773c592b9SEric Van Hensbergen static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) 982bad8471SEric Van Hensbergen { 992bad8471SEric Van Hensbergen int res; 1002bad8471SEric Van Hensbergen 1012bad8471SEric Van Hensbergen res = mode & 0777; 1022bad8471SEric Van Hensbergen 103bd238fb4SLatchesar Ionkov if ((mode & P9_DMDIR) == P9_DMDIR) 1042bad8471SEric Van Hensbergen res |= S_IFDIR; 1052405669bSLatchesar Ionkov else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses))) 1062bad8471SEric Van Hensbergen res |= S_IFLNK; 1072405669bSLatchesar Ionkov else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses)) 1082bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1092bad8471SEric Van Hensbergen res |= S_IFSOCK; 1102405669bSLatchesar Ionkov else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses)) 1112bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1122bad8471SEric Van Hensbergen res |= S_IFIFO; 1132405669bSLatchesar Ionkov else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses)) 1142bad8471SEric Van Hensbergen && (v9ses->nodev == 0)) 1152bad8471SEric Van Hensbergen res |= S_IFBLK; 1162bad8471SEric Van Hensbergen else 1172bad8471SEric Van Hensbergen res |= S_IFREG; 1182bad8471SEric Van Hensbergen 1192405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 120bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETUID) == P9_DMSETUID) 1212bad8471SEric Van Hensbergen res |= S_ISUID; 1222bad8471SEric Van Hensbergen 123bd238fb4SLatchesar Ionkov if ((mode & P9_DMSETGID) == P9_DMSETGID) 1242bad8471SEric Van Hensbergen res |= S_ISGID; 125d199d652SAnthony Liguori 126d199d652SAnthony Liguori if ((mode & P9_DMSETVTX) == P9_DMSETVTX) 127d199d652SAnthony Liguori res |= S_ISVTX; 1282bad8471SEric Van Hensbergen } 1292bad8471SEric Van Hensbergen 1302bad8471SEric Van Hensbergen return res; 1312bad8471SEric Van Hensbergen } 1322bad8471SEric Van Hensbergen 133ee443996SEric Van Hensbergen /** 134ee443996SEric Van Hensbergen * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits 135ee443996SEric Van Hensbergen * @uflags: flags to convert 1362e4bef41SEric Van Hensbergen * @extended: if .u extensions are active 137ee443996SEric Van Hensbergen */ 138ee443996SEric Van Hensbergen 1392e4bef41SEric Van Hensbergen int v9fs_uflags2omode(int uflags, int extended) 1406a3124a3SLatchesar Ionkov { 1416a3124a3SLatchesar Ionkov int ret; 1426a3124a3SLatchesar Ionkov 1436a3124a3SLatchesar Ionkov ret = 0; 1446a3124a3SLatchesar Ionkov switch (uflags&3) { 1456a3124a3SLatchesar Ionkov default: 1466a3124a3SLatchesar Ionkov case O_RDONLY: 147bd238fb4SLatchesar Ionkov ret = P9_OREAD; 1486a3124a3SLatchesar Ionkov break; 1496a3124a3SLatchesar Ionkov 1506a3124a3SLatchesar Ionkov case O_WRONLY: 151bd238fb4SLatchesar Ionkov ret = P9_OWRITE; 1526a3124a3SLatchesar Ionkov break; 1536a3124a3SLatchesar Ionkov 1546a3124a3SLatchesar Ionkov case O_RDWR: 155bd238fb4SLatchesar Ionkov ret = P9_ORDWR; 1566a3124a3SLatchesar Ionkov break; 1576a3124a3SLatchesar Ionkov } 1586a3124a3SLatchesar Ionkov 1596a3124a3SLatchesar Ionkov if (uflags & O_TRUNC) 160bd238fb4SLatchesar Ionkov ret |= P9_OTRUNC; 1616a3124a3SLatchesar Ionkov 1622e4bef41SEric Van Hensbergen if (extended) { 1632e4bef41SEric Van Hensbergen if (uflags & O_EXCL) 1642e4bef41SEric Van Hensbergen ret |= P9_OEXCL; 1652e4bef41SEric Van Hensbergen 1666a3124a3SLatchesar Ionkov if (uflags & O_APPEND) 167bd238fb4SLatchesar Ionkov ret |= P9_OAPPEND; 1682e4bef41SEric Van Hensbergen } 1696a3124a3SLatchesar Ionkov 1706a3124a3SLatchesar Ionkov return ret; 1716a3124a3SLatchesar Ionkov } 1726a3124a3SLatchesar Ionkov 1732bad8471SEric Van Hensbergen /** 174531b1094SLatchesar Ionkov * v9fs_blank_wstat - helper function to setup a 9P stat structure 175531b1094SLatchesar Ionkov * @wstat: structure to initialize 1762bad8471SEric Van Hensbergen * 1772bad8471SEric Van Hensbergen */ 1782bad8471SEric Van Hensbergen 17973c592b9SEric Van Hensbergen static void 180bd238fb4SLatchesar Ionkov v9fs_blank_wstat(struct p9_wstat *wstat) 1812bad8471SEric Van Hensbergen { 182531b1094SLatchesar Ionkov wstat->type = ~0; 183531b1094SLatchesar Ionkov wstat->dev = ~0; 184531b1094SLatchesar Ionkov wstat->qid.type = ~0; 185531b1094SLatchesar Ionkov wstat->qid.version = ~0; 186531b1094SLatchesar Ionkov *((long long *)&wstat->qid.path) = ~0; 187531b1094SLatchesar Ionkov wstat->mode = ~0; 188531b1094SLatchesar Ionkov wstat->atime = ~0; 189531b1094SLatchesar Ionkov wstat->mtime = ~0; 190531b1094SLatchesar Ionkov wstat->length = ~0; 191531b1094SLatchesar Ionkov wstat->name = NULL; 192531b1094SLatchesar Ionkov wstat->uid = NULL; 193531b1094SLatchesar Ionkov wstat->gid = NULL; 194531b1094SLatchesar Ionkov wstat->muid = NULL; 195531b1094SLatchesar Ionkov wstat->n_uid = ~0; 196531b1094SLatchesar Ionkov wstat->n_gid = ~0; 197531b1094SLatchesar Ionkov wstat->n_muid = ~0; 198531b1094SLatchesar Ionkov wstat->extension = NULL; 1992bad8471SEric Van Hensbergen } 2002bad8471SEric Van Hensbergen 20160e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 20260e78d2cSAbhishek Kulkarni /** 20360e78d2cSAbhishek Kulkarni * v9fs_alloc_inode - helper function to allocate an inode 20460e78d2cSAbhishek Kulkarni * This callback is executed before setting up the inode so that we 20560e78d2cSAbhishek Kulkarni * can associate a vcookie with each inode. 20660e78d2cSAbhishek Kulkarni * 20760e78d2cSAbhishek Kulkarni */ 20860e78d2cSAbhishek Kulkarni 20960e78d2cSAbhishek Kulkarni struct inode *v9fs_alloc_inode(struct super_block *sb) 21060e78d2cSAbhishek Kulkarni { 21160e78d2cSAbhishek Kulkarni struct v9fs_cookie *vcookie; 21260e78d2cSAbhishek Kulkarni vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, 21360e78d2cSAbhishek Kulkarni GFP_KERNEL); 21460e78d2cSAbhishek Kulkarni if (!vcookie) 21560e78d2cSAbhishek Kulkarni return NULL; 21660e78d2cSAbhishek Kulkarni 21760e78d2cSAbhishek Kulkarni vcookie->fscache = NULL; 21860e78d2cSAbhishek Kulkarni vcookie->qid = NULL; 21960e78d2cSAbhishek Kulkarni spin_lock_init(&vcookie->lock); 22060e78d2cSAbhishek Kulkarni return &vcookie->inode; 22160e78d2cSAbhishek Kulkarni } 22260e78d2cSAbhishek Kulkarni 22360e78d2cSAbhishek Kulkarni /** 22460e78d2cSAbhishek Kulkarni * v9fs_destroy_inode - destroy an inode 22560e78d2cSAbhishek Kulkarni * 22660e78d2cSAbhishek Kulkarni */ 22760e78d2cSAbhishek Kulkarni 22860e78d2cSAbhishek Kulkarni void v9fs_destroy_inode(struct inode *inode) 22960e78d2cSAbhishek Kulkarni { 23060e78d2cSAbhishek Kulkarni kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); 23160e78d2cSAbhishek Kulkarni } 23260e78d2cSAbhishek Kulkarni #endif 23360e78d2cSAbhishek Kulkarni 2342bad8471SEric Van Hensbergen /** 2352bad8471SEric Van Hensbergen * v9fs_get_inode - helper function to setup an inode 2362bad8471SEric Van Hensbergen * @sb: superblock 2372bad8471SEric Van Hensbergen * @mode: mode to setup inode with 2382bad8471SEric Van Hensbergen * 2392bad8471SEric Van Hensbergen */ 2402bad8471SEric Van Hensbergen 2412bad8471SEric Van Hensbergen struct inode *v9fs_get_inode(struct super_block *sb, int mode) 2422bad8471SEric Van Hensbergen { 2432bb54115SAbhishek Kulkarni int err; 2446a3124a3SLatchesar Ionkov struct inode *inode; 245b501611aSEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 2462bad8471SEric Van Hensbergen 247bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); 2482bad8471SEric Van Hensbergen 2492bad8471SEric Van Hensbergen inode = new_inode(sb); 2502bb54115SAbhishek Kulkarni if (!inode) { 2512bb54115SAbhishek Kulkarni P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); 25248559b4cSAbhishek Kulkarni return ERR_PTR(-ENOMEM); 2532bb54115SAbhishek Kulkarni } 2542bb54115SAbhishek Kulkarni 2552bad8471SEric Van Hensbergen inode->i_mode = mode; 256f8b9d53aSDavid Howells inode->i_uid = current_fsuid(); 257f8b9d53aSDavid Howells inode->i_gid = current_fsgid(); 2582bad8471SEric Van Hensbergen inode->i_blocks = 0; 2592bad8471SEric Van Hensbergen inode->i_rdev = 0; 2602bad8471SEric Van Hensbergen inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 261147b31cfSEric Van Hensbergen inode->i_mapping->a_ops = &v9fs_addr_operations; 2622bad8471SEric Van Hensbergen 2632bad8471SEric Van Hensbergen switch (mode & S_IFMT) { 2642bad8471SEric Van Hensbergen case S_IFIFO: 2652bad8471SEric Van Hensbergen case S_IFBLK: 2662bad8471SEric Van Hensbergen case S_IFCHR: 2672bad8471SEric Van Hensbergen case S_IFSOCK: 2682405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 269bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 270bd238fb4SLatchesar Ionkov "special files without extended mode\n"); 2712bb54115SAbhishek Kulkarni err = -EINVAL; 2722bb54115SAbhishek Kulkarni goto error; 273b501611aSEric Van Hensbergen } 2742bb54115SAbhishek Kulkarni init_special_inode(inode, inode->i_mode, inode->i_rdev); 2755d58bec5SEric Van Hensbergen break; 2762bad8471SEric Van Hensbergen case S_IFREG: 2772bad8471SEric Van Hensbergen inode->i_op = &v9fs_file_inode_operations; 2782bad8471SEric Van Hensbergen inode->i_fop = &v9fs_file_operations; 2792bad8471SEric Van Hensbergen break; 280b501611aSEric Van Hensbergen case S_IFLNK: 2812405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 282bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 283bd238fb4SLatchesar Ionkov "extended modes used w/o 9P2000.u\n"); 2842bb54115SAbhishek Kulkarni err = -EINVAL; 2852bb54115SAbhishek Kulkarni goto error; 286b501611aSEric Van Hensbergen } 287b501611aSEric Van Hensbergen inode->i_op = &v9fs_symlink_inode_operations; 288b501611aSEric Van Hensbergen break; 2892bad8471SEric Van Hensbergen case S_IFDIR: 290d8c76e6fSDave Hansen inc_nlink(inode); 2912405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) 292b501611aSEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations_ext; 293b501611aSEric Van Hensbergen else 2942bad8471SEric Van Hensbergen inode->i_op = &v9fs_dir_inode_operations; 2952bad8471SEric Van Hensbergen inode->i_fop = &v9fs_dir_operations; 2962bad8471SEric Van Hensbergen break; 2972bad8471SEric Van Hensbergen default: 2982bb54115SAbhishek Kulkarni P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", 2992bad8471SEric Van Hensbergen mode, mode & S_IFMT); 3002bb54115SAbhishek Kulkarni err = -EINVAL; 3012bb54115SAbhishek Kulkarni goto error; 3022bad8471SEric Van Hensbergen } 3032bb54115SAbhishek Kulkarni 3042bad8471SEric Van Hensbergen return inode; 3052bb54115SAbhishek Kulkarni 3062bb54115SAbhishek Kulkarni error: 3072bb54115SAbhishek Kulkarni iput(inode); 3082bb54115SAbhishek Kulkarni return ERR_PTR(err); 3092bad8471SEric Van Hensbergen } 3102bad8471SEric Van Hensbergen 311bd238fb4SLatchesar Ionkov /* 3126a3124a3SLatchesar Ionkov static struct v9fs_fid* 3136a3124a3SLatchesar Ionkov v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) 3146a3124a3SLatchesar Ionkov { 3156a3124a3SLatchesar Ionkov int err; 316736c4b85SMika Kukkonen int nfid; 3176a3124a3SLatchesar Ionkov struct v9fs_fid *ret; 3186a3124a3SLatchesar Ionkov struct v9fs_fcall *fcall; 3190b8dd177SLatchesar Ionkov 3206a3124a3SLatchesar Ionkov nfid = v9fs_get_idpool(&v9ses->fidpool); 3216a3124a3SLatchesar Ionkov if (nfid < 0) { 3220b8dd177SLatchesar Ionkov eprintk(KERN_WARNING, "no free fids available\n"); 323731805b4SLatchesar Ionkov return ERR_PTR(-ENOSPC); 3240b8dd177SLatchesar Ionkov } 3250b8dd177SLatchesar Ionkov 3266a3124a3SLatchesar Ionkov err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, 3276a3124a3SLatchesar Ionkov &fcall); 3286a3124a3SLatchesar Ionkov 3296a3124a3SLatchesar Ionkov if (err < 0) { 33041e5a6acSLatchesar Ionkov if (fcall && fcall->id == RWALK) 33141e5a6acSLatchesar Ionkov goto clunk_fid; 33241e5a6acSLatchesar Ionkov 3336a3124a3SLatchesar Ionkov PRINT_FCALL_ERROR("walk error", fcall); 3346a3124a3SLatchesar Ionkov v9fs_put_idpool(nfid, &v9ses->fidpool); 3356a3124a3SLatchesar Ionkov goto error; 3360b8dd177SLatchesar Ionkov } 3376a3124a3SLatchesar Ionkov 3383cf6429aSLatchesar Ionkov kfree(fcall); 3393cf6429aSLatchesar Ionkov fcall = NULL; 3406a3124a3SLatchesar Ionkov ret = v9fs_fid_create(v9ses, nfid); 3416a3124a3SLatchesar Ionkov if (!ret) { 3426a3124a3SLatchesar Ionkov err = -ENOMEM; 3436a3124a3SLatchesar Ionkov goto clunk_fid; 3440b8dd177SLatchesar Ionkov } 3452bad8471SEric Van Hensbergen 3466a3124a3SLatchesar Ionkov err = v9fs_fid_insert(ret, dentry); 3476a3124a3SLatchesar Ionkov if (err < 0) { 3486a3124a3SLatchesar Ionkov v9fs_fid_destroy(ret); 3496a3124a3SLatchesar Ionkov goto clunk_fid; 3506a3124a3SLatchesar Ionkov } 3512bad8471SEric Van Hensbergen 3526a3124a3SLatchesar Ionkov return ret; 3536a3124a3SLatchesar Ionkov 3546a3124a3SLatchesar Ionkov clunk_fid: 3556a3124a3SLatchesar Ionkov v9fs_t_clunk(v9ses, nfid); 3566a3124a3SLatchesar Ionkov 3576a3124a3SLatchesar Ionkov error: 3586a3124a3SLatchesar Ionkov kfree(fcall); 3596a3124a3SLatchesar Ionkov return ERR_PTR(err); 3606a3124a3SLatchesar Ionkov } 361bd238fb4SLatchesar Ionkov */ 3626a3124a3SLatchesar Ionkov 36360e78d2cSAbhishek Kulkarni 36460e78d2cSAbhishek Kulkarni /** 36560e78d2cSAbhishek Kulkarni * v9fs_clear_inode - release an inode 36660e78d2cSAbhishek Kulkarni * @inode: inode to release 36760e78d2cSAbhishek Kulkarni * 36860e78d2cSAbhishek Kulkarni */ 36960e78d2cSAbhishek Kulkarni void v9fs_clear_inode(struct inode *inode) 37060e78d2cSAbhishek Kulkarni { 37160e78d2cSAbhishek Kulkarni filemap_fdatawrite(inode->i_mapping); 37260e78d2cSAbhishek Kulkarni 37360e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 37460e78d2cSAbhishek Kulkarni v9fs_cache_inode_put_cookie(inode); 37560e78d2cSAbhishek Kulkarni #endif 37660e78d2cSAbhishek Kulkarni } 37760e78d2cSAbhishek Kulkarni 378ee443996SEric Van Hensbergen /** 379ee443996SEric Van Hensbergen * v9fs_inode_from_fid - populate an inode by issuing a attribute request 380ee443996SEric Van Hensbergen * @v9ses: session information 381ee443996SEric Van Hensbergen * @fid: fid to issue attribute request for 382ee443996SEric Van Hensbergen * @sb: superblock on which to create inode 383ee443996SEric Van Hensbergen * 384ee443996SEric Van Hensbergen */ 385ee443996SEric Van Hensbergen 3865174fdabSLatchesar Ionkov static struct inode * 387bd238fb4SLatchesar Ionkov v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, 3886a3124a3SLatchesar Ionkov struct super_block *sb) 3896a3124a3SLatchesar Ionkov { 3906a3124a3SLatchesar Ionkov int err, umode; 3916a3124a3SLatchesar Ionkov struct inode *ret; 39251a87c55SEric Van Hensbergen struct p9_wstat *st; 3936a3124a3SLatchesar Ionkov 3946a3124a3SLatchesar Ionkov ret = NULL; 395bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 39602bc3567SAbhishek Kulkarni if (IS_ERR(st)) 39702bc3567SAbhishek Kulkarni return ERR_CAST(st); 3982bad8471SEric Van Hensbergen 399bd238fb4SLatchesar Ionkov umode = p9mode2unixmode(v9ses, st->mode); 4006a3124a3SLatchesar Ionkov ret = v9fs_get_inode(sb, umode); 4016a3124a3SLatchesar Ionkov if (IS_ERR(ret)) { 4026a3124a3SLatchesar Ionkov err = PTR_ERR(ret); 4036a3124a3SLatchesar Ionkov goto error; 4042bad8471SEric Van Hensbergen } 4052bad8471SEric Van Hensbergen 406bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, ret, sb); 407bd238fb4SLatchesar Ionkov ret->i_ino = v9fs_qid2ino(&st->qid); 40860e78d2cSAbhishek Kulkarni 40960e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 41060e78d2cSAbhishek Kulkarni v9fs_vcookie_set_qid(ret, &st->qid); 41160e78d2cSAbhishek Kulkarni v9fs_cache_inode_get_cookie(ret); 41260e78d2cSAbhishek Kulkarni #endif 41302bc3567SAbhishek Kulkarni p9stat_free(st); 414bd238fb4SLatchesar Ionkov kfree(st); 41560e78d2cSAbhishek Kulkarni 4166a3124a3SLatchesar Ionkov return ret; 4172bad8471SEric Van Hensbergen 4186a3124a3SLatchesar Ionkov error: 41902bc3567SAbhishek Kulkarni p9stat_free(st); 420bd238fb4SLatchesar Ionkov kfree(st); 4216a3124a3SLatchesar Ionkov return ERR_PTR(err); 4222bad8471SEric Van Hensbergen } 4232bad8471SEric Van Hensbergen 4242bad8471SEric Van Hensbergen /** 4252bad8471SEric Van Hensbergen * v9fs_remove - helper function to remove files and directories 42673c592b9SEric Van Hensbergen * @dir: directory inode that is being deleted 42773c592b9SEric Van Hensbergen * @file: dentry that is being deleted 42873c592b9SEric Van Hensbergen * @rmdir: removing a directory 4292bad8471SEric Van Hensbergen * 4302bad8471SEric Van Hensbergen */ 4312bad8471SEric Van Hensbergen 4322bad8471SEric Van Hensbergen static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) 4332bad8471SEric Van Hensbergen { 434bd238fb4SLatchesar Ionkov struct inode *file_inode; 435bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 436bd238fb4SLatchesar Ionkov struct p9_fid *v9fid; 4372bad8471SEric Van Hensbergen 438bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, 4392bad8471SEric Van Hensbergen rmdir); 4402bad8471SEric Van Hensbergen 4412bad8471SEric Van Hensbergen file_inode = file->d_inode; 4422bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(file_inode); 443c959df9fSLatchesar Ionkov v9fid = v9fs_fid_clone(file); 444da977b2cSEric Van Hensbergen if (IS_ERR(v9fid)) 445da977b2cSEric Van Hensbergen return PTR_ERR(v9fid); 4462bad8471SEric Van Hensbergen 447bd238fb4SLatchesar Ionkov return p9_client_remove(v9fid); 4482bad8471SEric Van Hensbergen } 4492bad8471SEric Van Hensbergen 4506a3124a3SLatchesar Ionkov static int 4516a3124a3SLatchesar Ionkov v9fs_open_created(struct inode *inode, struct file *file) 4526a3124a3SLatchesar Ionkov { 4536a3124a3SLatchesar Ionkov return 0; 4546a3124a3SLatchesar Ionkov } 4556a3124a3SLatchesar Ionkov 456bd238fb4SLatchesar Ionkov 457bd238fb4SLatchesar Ionkov /** 458bd238fb4SLatchesar Ionkov * v9fs_create - Create a file 459ee443996SEric Van Hensbergen * @v9ses: session information 460ee443996SEric Van Hensbergen * @dir: directory that dentry is being created in 461bd238fb4SLatchesar Ionkov * @dentry: dentry that is being created 4620e15597eSAbhishek Kulkarni * @extension: 9p2000.u extension string to support devices, etc. 463bd238fb4SLatchesar Ionkov * @perm: create permissions 464bd238fb4SLatchesar Ionkov * @mode: open mode 465bd238fb4SLatchesar Ionkov * 466bd238fb4SLatchesar Ionkov */ 467bd238fb4SLatchesar Ionkov static struct p9_fid * 468bd238fb4SLatchesar Ionkov v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, 469bd238fb4SLatchesar Ionkov struct dentry *dentry, char *extension, u32 perm, u8 mode) 470bd238fb4SLatchesar Ionkov { 471bd238fb4SLatchesar Ionkov int err; 472bd238fb4SLatchesar Ionkov char *name; 473bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *ofid, *fid; 474bd238fb4SLatchesar Ionkov struct inode *inode; 475bd238fb4SLatchesar Ionkov 47651a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 47751a87c55SEric Van Hensbergen 478bd238fb4SLatchesar Ionkov err = 0; 479bd238fb4SLatchesar Ionkov ofid = NULL; 480bd238fb4SLatchesar Ionkov fid = NULL; 481bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 482bd238fb4SLatchesar Ionkov dfid = v9fs_fid_clone(dentry->d_parent); 483bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) { 484bd238fb4SLatchesar Ionkov err = PTR_ERR(dfid); 48551a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); 486bd238fb4SLatchesar Ionkov dfid = NULL; 487bd238fb4SLatchesar Ionkov goto error; 488bd238fb4SLatchesar Ionkov } 489bd238fb4SLatchesar Ionkov 490bd238fb4SLatchesar Ionkov /* clone a fid to use for creation */ 491bd238fb4SLatchesar Ionkov ofid = p9_client_walk(dfid, 0, NULL, 1); 492bd238fb4SLatchesar Ionkov if (IS_ERR(ofid)) { 493bd238fb4SLatchesar Ionkov err = PTR_ERR(ofid); 49451a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 495bd238fb4SLatchesar Ionkov ofid = NULL; 496bd238fb4SLatchesar Ionkov goto error; 497bd238fb4SLatchesar Ionkov } 498bd238fb4SLatchesar Ionkov 499bd238fb4SLatchesar Ionkov err = p9_client_fcreate(ofid, name, perm, mode, extension); 50051a87c55SEric Van Hensbergen if (err < 0) { 50151a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); 502bd238fb4SLatchesar Ionkov goto error; 50351a87c55SEric Van Hensbergen } 504bd238fb4SLatchesar Ionkov 505bd238fb4SLatchesar Ionkov /* now walk from the parent so we can get unopened fid */ 506bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 0); 507bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 508bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 50951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); 510bd238fb4SLatchesar Ionkov fid = NULL; 511bd238fb4SLatchesar Ionkov goto error; 512bd238fb4SLatchesar Ionkov } else 513bd238fb4SLatchesar Ionkov dfid = NULL; 514bd238fb4SLatchesar Ionkov 515bd238fb4SLatchesar Ionkov /* instantiate inode and assign the unopened fid to the dentry */ 516bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 517bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 518bd238fb4SLatchesar Ionkov err = PTR_ERR(inode); 51951a87c55SEric Van Hensbergen P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); 520bd238fb4SLatchesar Ionkov goto error; 521bd238fb4SLatchesar Ionkov } 522bd238fb4SLatchesar Ionkov 523bd238fb4SLatchesar Ionkov if (v9ses->cache) 524bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_cached_dentry_operations; 525bd238fb4SLatchesar Ionkov else 526bd238fb4SLatchesar Ionkov dentry->d_op = &v9fs_dentry_operations; 527bd238fb4SLatchesar Ionkov 528bd238fb4SLatchesar Ionkov d_instantiate(dentry, inode); 52950fb6d2bSAbhishek Kulkarni err = v9fs_fid_add(dentry, fid); 53050fb6d2bSAbhishek Kulkarni if (err < 0) 53150fb6d2bSAbhishek Kulkarni goto error; 53250fb6d2bSAbhishek Kulkarni 533bd238fb4SLatchesar Ionkov return ofid; 534bd238fb4SLatchesar Ionkov 535bd238fb4SLatchesar Ionkov error: 536bd238fb4SLatchesar Ionkov if (dfid) 537bd238fb4SLatchesar Ionkov p9_client_clunk(dfid); 538bd238fb4SLatchesar Ionkov 539bd238fb4SLatchesar Ionkov if (ofid) 540bd238fb4SLatchesar Ionkov p9_client_clunk(ofid); 541bd238fb4SLatchesar Ionkov 542bd238fb4SLatchesar Ionkov if (fid) 543bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 544bd238fb4SLatchesar Ionkov 545bd238fb4SLatchesar Ionkov return ERR_PTR(err); 546bd238fb4SLatchesar Ionkov } 547bd238fb4SLatchesar Ionkov 5482bad8471SEric Van Hensbergen /** 5492bad8471SEric Van Hensbergen * v9fs_vfs_create - VFS hook to create files 550ee443996SEric Van Hensbergen * @dir: directory inode that is being created 5512bad8471SEric Van Hensbergen * @dentry: dentry that is being deleted 5526a3124a3SLatchesar Ionkov * @mode: create permissions 5532bad8471SEric Van Hensbergen * @nd: path information 5542bad8471SEric Van Hensbergen * 5552bad8471SEric Van Hensbergen */ 5562bad8471SEric Van Hensbergen 5572bad8471SEric Van Hensbergen static int 5586a3124a3SLatchesar Ionkov v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 5592bad8471SEric Van Hensbergen struct nameidata *nd) 5602bad8471SEric Van Hensbergen { 5616a3124a3SLatchesar Ionkov int err; 562bd238fb4SLatchesar Ionkov u32 perm; 5636a3124a3SLatchesar Ionkov int flags; 5646a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 565bd238fb4SLatchesar Ionkov struct p9_fid *fid; 5666a3124a3SLatchesar Ionkov struct file *filp; 5676a3124a3SLatchesar Ionkov 568bd238fb4SLatchesar Ionkov err = 0; 569bd238fb4SLatchesar Ionkov fid = NULL; 5706a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 571da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 5726a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) 5736a3124a3SLatchesar Ionkov flags = nd->intent.open.flags - 1; 5746a3124a3SLatchesar Ionkov else 5756a3124a3SLatchesar Ionkov flags = O_RDWR; 5766a3124a3SLatchesar Ionkov 577bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, 5782e4bef41SEric Van Hensbergen v9fs_uflags2omode(flags, v9fs_extended(v9ses))); 579bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 580bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 581bd238fb4SLatchesar Ionkov fid = NULL; 5826a3124a3SLatchesar Ionkov goto error; 5836a3124a3SLatchesar Ionkov } 5846a3124a3SLatchesar Ionkov 585bd238fb4SLatchesar Ionkov /* if we are opening a file, assign the open fid to the file */ 5866a3124a3SLatchesar Ionkov if (nd && nd->flags & LOOKUP_OPEN) { 5876a3124a3SLatchesar Ionkov filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); 5886a3124a3SLatchesar Ionkov if (IS_ERR(filp)) { 589bd238fb4SLatchesar Ionkov err = PTR_ERR(filp); 590bd238fb4SLatchesar Ionkov goto error; 5916a3124a3SLatchesar Ionkov } 5926a3124a3SLatchesar Ionkov 593bd238fb4SLatchesar Ionkov filp->private_data = fid; 594bd238fb4SLatchesar Ionkov } else 595bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 5966a3124a3SLatchesar Ionkov 5976a3124a3SLatchesar Ionkov return 0; 5986a3124a3SLatchesar Ionkov 5996a3124a3SLatchesar Ionkov error: 600bd238fb4SLatchesar Ionkov if (fid) 601bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6026a3124a3SLatchesar Ionkov 6036a3124a3SLatchesar Ionkov return err; 6042bad8471SEric Van Hensbergen } 6052bad8471SEric Van Hensbergen 6062bad8471SEric Van Hensbergen /** 6072bad8471SEric Van Hensbergen * v9fs_vfs_mkdir - VFS mkdir hook to create a directory 608ee443996SEric Van Hensbergen * @dir: inode that is being unlinked 6092bad8471SEric Van Hensbergen * @dentry: dentry that is being unlinked 6102bad8471SEric Van Hensbergen * @mode: mode for new directory 6112bad8471SEric Van Hensbergen * 6122bad8471SEric Van Hensbergen */ 6132bad8471SEric Van Hensbergen 6146a3124a3SLatchesar Ionkov static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 6152bad8471SEric Van Hensbergen { 6166a3124a3SLatchesar Ionkov int err; 617bd238fb4SLatchesar Ionkov u32 perm; 6186a3124a3SLatchesar Ionkov struct v9fs_session_info *v9ses; 619bd238fb4SLatchesar Ionkov struct p9_fid *fid; 6206a3124a3SLatchesar Ionkov 621bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); 622bd238fb4SLatchesar Ionkov err = 0; 6236a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 6246a3124a3SLatchesar Ionkov perm = unixmode2p9mode(v9ses, mode | S_IFDIR); 625bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); 626bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 627bd238fb4SLatchesar Ionkov err = PTR_ERR(fid); 628bd238fb4SLatchesar Ionkov fid = NULL; 6296a3124a3SLatchesar Ionkov } 6306a3124a3SLatchesar Ionkov 631bd238fb4SLatchesar Ionkov if (fid) 632bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 6336a3124a3SLatchesar Ionkov 6346a3124a3SLatchesar Ionkov return err; 6352bad8471SEric Van Hensbergen } 6362bad8471SEric Van Hensbergen 6372bad8471SEric Van Hensbergen /** 6382bad8471SEric Van Hensbergen * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode 6392bad8471SEric Van Hensbergen * @dir: inode that is being walked from 6402bad8471SEric Van Hensbergen * @dentry: dentry that is being walked to? 6412bad8471SEric Van Hensbergen * @nameidata: path data 6422bad8471SEric Van Hensbergen * 6432bad8471SEric Van Hensbergen */ 6442bad8471SEric Van Hensbergen 6452bad8471SEric Van Hensbergen static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, 6462bad8471SEric Van Hensbergen struct nameidata *nameidata) 6472bad8471SEric Van Hensbergen { 6482bad8471SEric Van Hensbergen struct super_block *sb; 6492bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses; 650bd238fb4SLatchesar Ionkov struct p9_fid *dfid, *fid; 6512bad8471SEric Van Hensbergen struct inode *inode; 652bd238fb4SLatchesar Ionkov char *name; 6532bad8471SEric Van Hensbergen int result = 0; 6542bad8471SEric Van Hensbergen 655bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", 656731805b4SLatchesar Ionkov dir, dentry->d_name.name, dentry, nameidata); 6572bad8471SEric Van Hensbergen 6582bad8471SEric Van Hensbergen sb = dir->i_sb; 6592bad8471SEric Van Hensbergen v9ses = v9fs_inode2v9ses(dir); 660bd238fb4SLatchesar Ionkov dfid = v9fs_fid_lookup(dentry->d_parent); 661bd238fb4SLatchesar Ionkov if (IS_ERR(dfid)) 662e231c2eeSDavid Howells return ERR_CAST(dfid); 6632bad8471SEric Van Hensbergen 664bd238fb4SLatchesar Ionkov name = (char *) dentry->d_name.name; 665bd238fb4SLatchesar Ionkov fid = p9_client_walk(dfid, 1, &name, 1); 666bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) { 667bd238fb4SLatchesar Ionkov result = PTR_ERR(fid); 6682bad8471SEric Van Hensbergen if (result == -ENOENT) { 6692bad8471SEric Van Hensbergen d_add(dentry, NULL); 6702bad8471SEric Van Hensbergen return NULL; 6712bad8471SEric Van Hensbergen } 6722bad8471SEric Van Hensbergen 673bd238fb4SLatchesar Ionkov return ERR_PTR(result); 6742bad8471SEric Van Hensbergen } 6752bad8471SEric Van Hensbergen 676bd238fb4SLatchesar Ionkov inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); 677bd238fb4SLatchesar Ionkov if (IS_ERR(inode)) { 678bd238fb4SLatchesar Ionkov result = PTR_ERR(inode); 679bd238fb4SLatchesar Ionkov inode = NULL; 680bd238fb4SLatchesar Ionkov goto error; 6812bad8471SEric Van Hensbergen } 6822bad8471SEric Van Hensbergen 683bd238fb4SLatchesar Ionkov result = v9fs_fid_add(dentry, fid); 6846a3124a3SLatchesar Ionkov if (result < 0) 685bd238fb4SLatchesar Ionkov goto error; 6866a3124a3SLatchesar Ionkov 687e03abc0cSEric Van Hensbergen if ((fid->qid.version) && (v9ses->cache)) 688e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_cached_dentry_operations; 689e03abc0cSEric Van Hensbergen else 690e03abc0cSEric Van Hensbergen dentry->d_op = &v9fs_dentry_operations; 6912bad8471SEric Van Hensbergen 6922bad8471SEric Van Hensbergen d_add(dentry, inode); 6932bad8471SEric Van Hensbergen return NULL; 6942bad8471SEric Van Hensbergen 695bd238fb4SLatchesar Ionkov error: 696bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 697da977b2cSEric Van Hensbergen 6982bad8471SEric Van Hensbergen return ERR_PTR(result); 6992bad8471SEric Van Hensbergen } 7002bad8471SEric Van Hensbergen 7012bad8471SEric Van Hensbergen /** 7022bad8471SEric Van Hensbergen * v9fs_vfs_unlink - VFS unlink hook to delete an inode 7032bad8471SEric Van Hensbergen * @i: inode that is being unlinked 70473c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7052bad8471SEric Van Hensbergen * 7062bad8471SEric Van Hensbergen */ 7072bad8471SEric Van Hensbergen 7082bad8471SEric Van Hensbergen static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) 7092bad8471SEric Van Hensbergen { 7102bad8471SEric Van Hensbergen return v9fs_remove(i, d, 0); 7112bad8471SEric Van Hensbergen } 7122bad8471SEric Van Hensbergen 7132bad8471SEric Van Hensbergen /** 7142bad8471SEric Van Hensbergen * v9fs_vfs_rmdir - VFS unlink hook to delete a directory 7152bad8471SEric Van Hensbergen * @i: inode that is being unlinked 71673c592b9SEric Van Hensbergen * @d: dentry that is being unlinked 7172bad8471SEric Van Hensbergen * 7182bad8471SEric Van Hensbergen */ 7192bad8471SEric Van Hensbergen 7202bad8471SEric Van Hensbergen static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) 7212bad8471SEric Van Hensbergen { 7222bad8471SEric Van Hensbergen return v9fs_remove(i, d, 1); 7232bad8471SEric Van Hensbergen } 7242bad8471SEric Van Hensbergen 7252bad8471SEric Van Hensbergen /** 7262bad8471SEric Van Hensbergen * v9fs_vfs_rename - VFS hook to rename an inode 7272bad8471SEric Van Hensbergen * @old_dir: old dir inode 7282bad8471SEric Van Hensbergen * @old_dentry: old dentry 7292bad8471SEric Van Hensbergen * @new_dir: new dir inode 7302bad8471SEric Van Hensbergen * @new_dentry: new dentry 7312bad8471SEric Van Hensbergen * 7322bad8471SEric Van Hensbergen */ 7332bad8471SEric Van Hensbergen 7342bad8471SEric Van Hensbergen static int 7352bad8471SEric Van Hensbergen v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 7362bad8471SEric Van Hensbergen struct inode *new_dir, struct dentry *new_dentry) 7372bad8471SEric Van Hensbergen { 738bd238fb4SLatchesar Ionkov struct inode *old_inode; 739bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 740bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 741bd238fb4SLatchesar Ionkov struct p9_fid *olddirfid; 742bd238fb4SLatchesar Ionkov struct p9_fid *newdirfid; 743bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 744bd238fb4SLatchesar Ionkov int retval; 7452bad8471SEric Van Hensbergen 746bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 747bd238fb4SLatchesar Ionkov retval = 0; 748bd238fb4SLatchesar Ionkov old_inode = old_dentry->d_inode; 749bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(old_inode); 750bd238fb4SLatchesar Ionkov oldfid = v9fs_fid_lookup(old_dentry); 751da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 752da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 753da977b2cSEric Van Hensbergen 754da977b2cSEric Van Hensbergen olddirfid = v9fs_fid_clone(old_dentry->d_parent); 755da977b2cSEric Van Hensbergen if (IS_ERR(olddirfid)) { 756da977b2cSEric Van Hensbergen retval = PTR_ERR(olddirfid); 757bd238fb4SLatchesar Ionkov goto done; 758da977b2cSEric Van Hensbergen } 759da977b2cSEric Van Hensbergen 760da977b2cSEric Van Hensbergen newdirfid = v9fs_fid_clone(new_dentry->d_parent); 761da977b2cSEric Van Hensbergen if (IS_ERR(newdirfid)) { 762da977b2cSEric Van Hensbergen retval = PTR_ERR(newdirfid); 763bd238fb4SLatchesar Ionkov goto clunk_olddir; 7642bad8471SEric Van Hensbergen } 7652bad8471SEric Van Hensbergen 7662bad8471SEric Van Hensbergen /* 9P can only handle file rename in the same directory */ 7672bad8471SEric Van Hensbergen if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { 768bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 769bd238fb4SLatchesar Ionkov "old dir and new dir are different\n"); 770621997cdSEric Van Hensbergen retval = -EXDEV; 771bd238fb4SLatchesar Ionkov goto clunk_newdir; 7722bad8471SEric Van Hensbergen } 7732bad8471SEric Van Hensbergen 774531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 775ba17674fSLatchesar Ionkov wstat.muid = v9ses->uname; 776531b1094SLatchesar Ionkov wstat.name = (char *) new_dentry->d_name.name; 777bd238fb4SLatchesar Ionkov retval = p9_client_wstat(oldfid, &wstat); 7782bad8471SEric Van Hensbergen 779bd238fb4SLatchesar Ionkov clunk_newdir: 78022150c4fSLatchesar Ionkov p9_client_clunk(newdirfid); 7812bad8471SEric Van Hensbergen 782bd238fb4SLatchesar Ionkov clunk_olddir: 78322150c4fSLatchesar Ionkov p9_client_clunk(olddirfid); 7842bad8471SEric Van Hensbergen 785bd238fb4SLatchesar Ionkov done: 7862bad8471SEric Van Hensbergen return retval; 7872bad8471SEric Van Hensbergen } 7882bad8471SEric Van Hensbergen 7892bad8471SEric Van Hensbergen /** 790943ffb58SAdrian Bunk * v9fs_vfs_getattr - retrieve file metadata 791ee443996SEric Van Hensbergen * @mnt: mount information 792ee443996SEric Van Hensbergen * @dentry: file to get attributes on 793ee443996SEric Van Hensbergen * @stat: metadata structure to populate 7942bad8471SEric Van Hensbergen * 7952bad8471SEric Van Hensbergen */ 7962bad8471SEric Van Hensbergen 7972bad8471SEric Van Hensbergen static int 7982bad8471SEric Van Hensbergen v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 7992bad8471SEric Van Hensbergen struct kstat *stat) 8002bad8471SEric Van Hensbergen { 801bd238fb4SLatchesar Ionkov int err; 802bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 803bd238fb4SLatchesar Ionkov struct p9_fid *fid; 80451a87c55SEric Van Hensbergen struct p9_wstat *st; 8052bad8471SEric Van Hensbergen 806bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); 807bd238fb4SLatchesar Ionkov err = -EPERM; 808bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 80960e78d2cSAbhishek Kulkarni if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) 8109523a841SEric Van Hensbergen return simple_getattr(mnt, dentry, stat); 8119523a841SEric Van Hensbergen 812bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 813da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 814da977b2cSEric Van Hensbergen return PTR_ERR(fid); 8152bad8471SEric Van Hensbergen 816bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 817bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 818bd238fb4SLatchesar Ionkov return PTR_ERR(st); 8192bad8471SEric Van Hensbergen 820bd238fb4SLatchesar Ionkov v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); 8212bad8471SEric Van Hensbergen generic_fillattr(dentry->d_inode, stat); 8222bad8471SEric Van Hensbergen 823bd238fb4SLatchesar Ionkov kfree(st); 824bd238fb4SLatchesar Ionkov return 0; 8252bad8471SEric Van Hensbergen } 8262bad8471SEric Van Hensbergen 8272bad8471SEric Van Hensbergen /** 8282bad8471SEric Van Hensbergen * v9fs_vfs_setattr - set file metadata 8292bad8471SEric Van Hensbergen * @dentry: file whose metadata to set 8302bad8471SEric Van Hensbergen * @iattr: metadata assignment structure 8312bad8471SEric Van Hensbergen * 8322bad8471SEric Van Hensbergen */ 8332bad8471SEric Van Hensbergen 8342bad8471SEric Van Hensbergen static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 8352bad8471SEric Van Hensbergen { 836bd238fb4SLatchesar Ionkov int retval; 837bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 838bd238fb4SLatchesar Ionkov struct p9_fid *fid; 839bd238fb4SLatchesar Ionkov struct p9_wstat wstat; 8402bad8471SEric Van Hensbergen 841bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "\n"); 842bd238fb4SLatchesar Ionkov retval = -EPERM; 843bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 844bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 845da977b2cSEric Van Hensbergen if(IS_ERR(fid)) 846da977b2cSEric Van Hensbergen return PTR_ERR(fid); 8472bad8471SEric Van Hensbergen 848531b1094SLatchesar Ionkov v9fs_blank_wstat(&wstat); 8492bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MODE) 850531b1094SLatchesar Ionkov wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); 8512bad8471SEric Van Hensbergen 8522bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_MTIME) 853531b1094SLatchesar Ionkov wstat.mtime = iattr->ia_mtime.tv_sec; 8542bad8471SEric Van Hensbergen 8552bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_ATIME) 856531b1094SLatchesar Ionkov wstat.atime = iattr->ia_atime.tv_sec; 8572bad8471SEric Van Hensbergen 8582bad8471SEric Van Hensbergen if (iattr->ia_valid & ATTR_SIZE) 859531b1094SLatchesar Ionkov wstat.length = iattr->ia_size; 8602bad8471SEric Van Hensbergen 8612405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 862531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_UID) 863531b1094SLatchesar Ionkov wstat.n_uid = iattr->ia_uid; 8642bad8471SEric Van Hensbergen 865531b1094SLatchesar Ionkov if (iattr->ia_valid & ATTR_GID) 866531b1094SLatchesar Ionkov wstat.n_gid = iattr->ia_gid; 8672bad8471SEric Van Hensbergen } 8682bad8471SEric Van Hensbergen 869bd238fb4SLatchesar Ionkov retval = p9_client_wstat(fid, &wstat); 870bd238fb4SLatchesar Ionkov if (retval >= 0) 871bd238fb4SLatchesar Ionkov retval = inode_setattr(dentry->d_inode, iattr); 8722bad8471SEric Van Hensbergen 873bd238fb4SLatchesar Ionkov return retval; 8742bad8471SEric Van Hensbergen } 8752bad8471SEric Van Hensbergen 8762bad8471SEric Van Hensbergen /** 877531b1094SLatchesar Ionkov * v9fs_stat2inode - populate an inode structure with mistat info 878531b1094SLatchesar Ionkov * @stat: Plan 9 metadata (mistat) structure 8792bad8471SEric Van Hensbergen * @inode: inode to populate 8802bad8471SEric Van Hensbergen * @sb: superblock of filesystem 8812bad8471SEric Van Hensbergen * 8822bad8471SEric Van Hensbergen */ 8832bad8471SEric Van Hensbergen 8842bad8471SEric Van Hensbergen void 88551a87c55SEric Van Hensbergen v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, 8862bad8471SEric Van Hensbergen struct super_block *sb) 8872bad8471SEric Van Hensbergen { 888531b1094SLatchesar Ionkov char ext[32]; 8892bad8471SEric Van Hensbergen struct v9fs_session_info *v9ses = sb->s_fs_info; 8902bad8471SEric Van Hensbergen 8912bad8471SEric Van Hensbergen inode->i_nlink = 1; 8922bad8471SEric Van Hensbergen 893531b1094SLatchesar Ionkov inode->i_atime.tv_sec = stat->atime; 894531b1094SLatchesar Ionkov inode->i_mtime.tv_sec = stat->mtime; 895531b1094SLatchesar Ionkov inode->i_ctime.tv_sec = stat->mtime; 8962bad8471SEric Van Hensbergen 897bd32b82dSLatchesar Ionkov inode->i_uid = v9ses->dfltuid; 898bd32b82dSLatchesar Ionkov inode->i_gid = v9ses->dfltgid; 8992bad8471SEric Van Hensbergen 9002405669bSLatchesar Ionkov if (v9fs_extended(v9ses)) { 901531b1094SLatchesar Ionkov inode->i_uid = stat->n_uid; 902531b1094SLatchesar Ionkov inode->i_gid = stat->n_gid; 903531b1094SLatchesar Ionkov } 904531b1094SLatchesar Ionkov 905531b1094SLatchesar Ionkov inode->i_mode = p9mode2unixmode(v9ses, stat->mode); 9062bad8471SEric Van Hensbergen if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { 9072bad8471SEric Van Hensbergen char type = 0; 9082bad8471SEric Van Hensbergen int major = -1; 9092bad8471SEric Van Hensbergen int minor = -1; 910531b1094SLatchesar Ionkov 91151a87c55SEric Van Hensbergen strncpy(ext, stat->extension, sizeof(ext)); 912531b1094SLatchesar Ionkov sscanf(ext, "%c %u %u", &type, &major, &minor); 9132bad8471SEric Van Hensbergen switch (type) { 9142bad8471SEric Van Hensbergen case 'c': 9152bad8471SEric Van Hensbergen inode->i_mode &= ~S_IFBLK; 9162bad8471SEric Van Hensbergen inode->i_mode |= S_IFCHR; 9172bad8471SEric Van Hensbergen break; 9182bad8471SEric Van Hensbergen case 'b': 9192bad8471SEric Van Hensbergen break; 9202bad8471SEric Van Hensbergen default: 921bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 92251a87c55SEric Van Hensbergen "Unknown special type %c %s\n", type, 92351a87c55SEric Van Hensbergen stat->extension); 9242bad8471SEric Van Hensbergen }; 9252bad8471SEric Van Hensbergen inode->i_rdev = MKDEV(major, minor); 92657c7b4e6SMagnus Deininger init_special_inode(inode, inode->i_mode, inode->i_rdev); 9272bad8471SEric Van Hensbergen } else 9282bad8471SEric Van Hensbergen inode->i_rdev = 0; 9292bad8471SEric Van Hensbergen 9307549ae3eSAbhishek Kulkarni i_size_write(inode, stat->length); 9312bad8471SEric Van Hensbergen 932bd238fb4SLatchesar Ionkov /* not real number of blocks, but 512 byte ones ... */ 9337549ae3eSAbhishek Kulkarni inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; 9342bad8471SEric Van Hensbergen } 9352bad8471SEric Van Hensbergen 9362bad8471SEric Van Hensbergen /** 9372bad8471SEric Van Hensbergen * v9fs_qid2ino - convert qid into inode number 9382bad8471SEric Van Hensbergen * @qid: qid to hash 9392bad8471SEric Van Hensbergen * 9402bad8471SEric Van Hensbergen * BUG: potential for inode number collisions? 9412bad8471SEric Van Hensbergen */ 9422bad8471SEric Van Hensbergen 943bd238fb4SLatchesar Ionkov ino_t v9fs_qid2ino(struct p9_qid *qid) 9442bad8471SEric Van Hensbergen { 9452bad8471SEric Van Hensbergen u64 path = qid->path + 2; 9462bad8471SEric Van Hensbergen ino_t i = 0; 9472bad8471SEric Van Hensbergen 9482bad8471SEric Van Hensbergen if (sizeof(ino_t) == sizeof(path)) 9492bad8471SEric Van Hensbergen memcpy(&i, &path, sizeof(ino_t)); 9502bad8471SEric Van Hensbergen else 9512bad8471SEric Van Hensbergen i = (ino_t) (path ^ (path >> 32)); 9522bad8471SEric Van Hensbergen 9532bad8471SEric Van Hensbergen return i; 9542bad8471SEric Van Hensbergen } 9552bad8471SEric Van Hensbergen 9562bad8471SEric Van Hensbergen /** 9572bad8471SEric Van Hensbergen * v9fs_readlink - read a symlink's location (internal version) 9582bad8471SEric Van Hensbergen * @dentry: dentry for symlink 95973c592b9SEric Van Hensbergen * @buffer: buffer to load symlink location into 9602bad8471SEric Van Hensbergen * @buflen: length of buffer 9612bad8471SEric Van Hensbergen * 9622bad8471SEric Van Hensbergen */ 9632bad8471SEric Van Hensbergen 9642bad8471SEric Van Hensbergen static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 9652bad8471SEric Van Hensbergen { 966bd238fb4SLatchesar Ionkov int retval; 9672bad8471SEric Van Hensbergen 968bd238fb4SLatchesar Ionkov struct v9fs_session_info *v9ses; 969bd238fb4SLatchesar Ionkov struct p9_fid *fid; 97051a87c55SEric Van Hensbergen struct p9_wstat *st; 9712bad8471SEric Van Hensbergen 972bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); 973bd238fb4SLatchesar Ionkov retval = -EPERM; 974bd238fb4SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dentry->d_inode); 975bd238fb4SLatchesar Ionkov fid = v9fs_fid_lookup(dentry); 976da977b2cSEric Van Hensbergen if (IS_ERR(fid)) 977da977b2cSEric Van Hensbergen return PTR_ERR(fid); 9782bad8471SEric Van Hensbergen 9792405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) 980bd238fb4SLatchesar Ionkov return -EBADF; 9812bad8471SEric Van Hensbergen 982bd238fb4SLatchesar Ionkov st = p9_client_stat(fid); 983bd238fb4SLatchesar Ionkov if (IS_ERR(st)) 984bd238fb4SLatchesar Ionkov return PTR_ERR(st); 9852bad8471SEric Van Hensbergen 986bd238fb4SLatchesar Ionkov if (!(st->mode & P9_DMSYMLINK)) { 9872bad8471SEric Van Hensbergen retval = -EINVAL; 988bd238fb4SLatchesar Ionkov goto done; 9892bad8471SEric Van Hensbergen } 9902bad8471SEric Van Hensbergen 9912bad8471SEric Van Hensbergen /* copy extension buffer into buffer */ 99251a87c55SEric Van Hensbergen strncpy(buffer, st->extension, buflen); 9932bad8471SEric Van Hensbergen 994bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 99551a87c55SEric Van Hensbergen "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); 996bd238fb4SLatchesar Ionkov 9972bad8471SEric Van Hensbergen retval = buflen; 9982bad8471SEric Van Hensbergen 999bd238fb4SLatchesar Ionkov done: 1000bd238fb4SLatchesar Ionkov kfree(st); 10012bad8471SEric Van Hensbergen return retval; 10022bad8471SEric Van Hensbergen } 10032bad8471SEric Van Hensbergen 10042bad8471SEric Van Hensbergen /** 10052bad8471SEric Van Hensbergen * v9fs_vfs_readlink - read a symlink's location 10062bad8471SEric Van Hensbergen * @dentry: dentry for symlink 1007ee443996SEric Van Hensbergen * @buffer: buffer to load symlink location into 10082bad8471SEric Van Hensbergen * @buflen: length of buffer 10092bad8471SEric Van Hensbergen * 10102bad8471SEric Van Hensbergen */ 10112bad8471SEric Van Hensbergen 10122bad8471SEric Van Hensbergen static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 10132bad8471SEric Van Hensbergen int buflen) 10142bad8471SEric Van Hensbergen { 10152bad8471SEric Van Hensbergen int retval; 10162bad8471SEric Van Hensbergen int ret; 10172bad8471SEric Van Hensbergen char *link = __getname(); 10182bad8471SEric Van Hensbergen 10190710d36aSFlorin Malita if (unlikely(!link)) 10200710d36aSFlorin Malita return -ENOMEM; 10210710d36aSFlorin Malita 1022a1f9d8d2SLatchesar Ionkov if (buflen > PATH_MAX) 1023a1f9d8d2SLatchesar Ionkov buflen = PATH_MAX; 10242bad8471SEric Van Hensbergen 10257dd0cdc5SWu Fengguang P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, 10267dd0cdc5SWu Fengguang dentry); 10272bad8471SEric Van Hensbergen 10282bad8471SEric Van Hensbergen retval = v9fs_readlink(dentry, link, buflen); 10292bad8471SEric Van Hensbergen 10302bad8471SEric Van Hensbergen if (retval > 0) { 10312bad8471SEric Van Hensbergen if ((ret = copy_to_user(buffer, link, retval)) != 0) { 1032bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, 1033bd238fb4SLatchesar Ionkov "problem copying to user: %d\n", ret); 10342bad8471SEric Van Hensbergen retval = ret; 10352bad8471SEric Van Hensbergen } 10362bad8471SEric Van Hensbergen } 10372bad8471SEric Van Hensbergen 1038ce44eeb6SDavi Arnaut __putname(link); 10392bad8471SEric Van Hensbergen return retval; 10402bad8471SEric Van Hensbergen } 10412bad8471SEric Van Hensbergen 10422bad8471SEric Van Hensbergen /** 10432bad8471SEric Van Hensbergen * v9fs_vfs_follow_link - follow a symlink path 10442bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10452bad8471SEric Van Hensbergen * @nd: nameidata 10462bad8471SEric Van Hensbergen * 10472bad8471SEric Van Hensbergen */ 10482bad8471SEric Van Hensbergen 10492bad8471SEric Van Hensbergen static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) 10502bad8471SEric Van Hensbergen { 10512bad8471SEric Van Hensbergen int len = 0; 10522bad8471SEric Van Hensbergen char *link = __getname(); 10532bad8471SEric Van Hensbergen 1054bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); 10552bad8471SEric Van Hensbergen 10562bad8471SEric Van Hensbergen if (!link) 10572bad8471SEric Van Hensbergen link = ERR_PTR(-ENOMEM); 10582bad8471SEric Van Hensbergen else { 105916cce6d2SLatchesar Ionkov len = v9fs_readlink(dentry, link, PATH_MAX); 10602bad8471SEric Van Hensbergen 10612bad8471SEric Van Hensbergen if (len < 0) { 1062ce44eeb6SDavi Arnaut __putname(link); 10632bad8471SEric Van Hensbergen link = ERR_PTR(len); 10642bad8471SEric Van Hensbergen } else 10652bad8471SEric Van Hensbergen link[len] = 0; 10662bad8471SEric Van Hensbergen } 10672bad8471SEric Van Hensbergen nd_set_link(nd, link); 10682bad8471SEric Van Hensbergen 10692bad8471SEric Van Hensbergen return NULL; 10702bad8471SEric Van Hensbergen } 10712bad8471SEric Van Hensbergen 10722bad8471SEric Van Hensbergen /** 10732bad8471SEric Van Hensbergen * v9fs_vfs_put_link - release a symlink path 10742bad8471SEric Van Hensbergen * @dentry: dentry for symlink 10752bad8471SEric Van Hensbergen * @nd: nameidata 1076ee443996SEric Van Hensbergen * @p: unused 10772bad8471SEric Van Hensbergen * 10782bad8471SEric Van Hensbergen */ 10792bad8471SEric Van Hensbergen 1080ee443996SEric Van Hensbergen static void 1081ee443996SEric Van Hensbergen v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 10822bad8471SEric Van Hensbergen { 10832bad8471SEric Van Hensbergen char *s = nd_get_link(nd); 10842bad8471SEric Van Hensbergen 10856ff23207SDuane Griffin P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, 10866ff23207SDuane Griffin IS_ERR(s) ? "<error>" : s); 10872bad8471SEric Van Hensbergen if (!IS_ERR(s)) 1088ce44eeb6SDavi Arnaut __putname(s); 10892bad8471SEric Van Hensbergen } 10902bad8471SEric Van Hensbergen 1091ee443996SEric Van Hensbergen /** 1092ee443996SEric Van Hensbergen * v9fs_vfs_mkspecial - create a special file 1093ee443996SEric Van Hensbergen * @dir: inode to create special file in 1094ee443996SEric Van Hensbergen * @dentry: dentry to create 1095ee443996SEric Van Hensbergen * @mode: mode to create special file 1096ee443996SEric Van Hensbergen * @extension: 9p2000.u format extension string representing special file 1097ee443996SEric Van Hensbergen * 1098ee443996SEric Van Hensbergen */ 1099ee443996SEric Van Hensbergen 1100531b1094SLatchesar Ionkov static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, 1101531b1094SLatchesar Ionkov int mode, const char *extension) 1102531b1094SLatchesar Ionkov { 1103bd238fb4SLatchesar Ionkov u32 perm; 1104531b1094SLatchesar Ionkov struct v9fs_session_info *v9ses; 1105bd238fb4SLatchesar Ionkov struct p9_fid *fid; 1106531b1094SLatchesar Ionkov 11076a3124a3SLatchesar Ionkov v9ses = v9fs_inode2v9ses(dir); 11082405669bSLatchesar Ionkov if (!v9fs_extended(v9ses)) { 1109bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); 11106a3124a3SLatchesar Ionkov return -EPERM; 1111531b1094SLatchesar Ionkov } 1112531b1094SLatchesar Ionkov 1113da977b2cSEric Van Hensbergen perm = unixmode2p9mode(v9ses, mode); 1114bd238fb4SLatchesar Ionkov fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, 1115bd238fb4SLatchesar Ionkov P9_OREAD); 1116bd238fb4SLatchesar Ionkov if (IS_ERR(fid)) 1117bd238fb4SLatchesar Ionkov return PTR_ERR(fid); 1118da977b2cSEric Van Hensbergen 1119bd238fb4SLatchesar Ionkov p9_client_clunk(fid); 11206a3124a3SLatchesar Ionkov return 0; 1121531b1094SLatchesar Ionkov } 1122531b1094SLatchesar Ionkov 1123531b1094SLatchesar Ionkov /** 1124531b1094SLatchesar Ionkov * v9fs_vfs_symlink - helper function to create symlinks 1125531b1094SLatchesar Ionkov * @dir: directory inode containing symlink 1126531b1094SLatchesar Ionkov * @dentry: dentry for symlink 1127531b1094SLatchesar Ionkov * @symname: symlink data 1128531b1094SLatchesar Ionkov * 1129ee443996SEric Van Hensbergen * See Also: 9P2000.u RFC for more information 1130531b1094SLatchesar Ionkov * 1131531b1094SLatchesar Ionkov */ 1132531b1094SLatchesar Ionkov 1133531b1094SLatchesar Ionkov static int 1134531b1094SLatchesar Ionkov v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) 1135531b1094SLatchesar Ionkov { 1136bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, 1137bd238fb4SLatchesar Ionkov dentry->d_name.name, symname); 1138531b1094SLatchesar Ionkov 1139531b1094SLatchesar Ionkov return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); 1140531b1094SLatchesar Ionkov } 1141531b1094SLatchesar Ionkov 11422bad8471SEric Van Hensbergen /** 11432bad8471SEric Van Hensbergen * v9fs_vfs_link - create a hardlink 11442bad8471SEric Van Hensbergen * @old_dentry: dentry for file to link to 11452bad8471SEric Van Hensbergen * @dir: inode destination for new link 114673c592b9SEric Van Hensbergen * @dentry: dentry for link 11472bad8471SEric Van Hensbergen * 11482bad8471SEric Van Hensbergen */ 11492bad8471SEric Van Hensbergen 11502bad8471SEric Van Hensbergen static int 11512bad8471SEric Van Hensbergen v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, 11522bad8471SEric Van Hensbergen struct dentry *dentry) 11532bad8471SEric Van Hensbergen { 1154531b1094SLatchesar Ionkov int retval; 1155bd238fb4SLatchesar Ionkov struct p9_fid *oldfid; 1156531b1094SLatchesar Ionkov char *name; 11572bad8471SEric Van Hensbergen 1158bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1159bd238fb4SLatchesar Ionkov " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, 11602bad8471SEric Van Hensbergen old_dentry->d_name.name); 11612bad8471SEric Van Hensbergen 1162da977b2cSEric Van Hensbergen oldfid = v9fs_fid_clone(old_dentry); 1163da977b2cSEric Van Hensbergen if (IS_ERR(oldfid)) 1164da977b2cSEric Van Hensbergen return PTR_ERR(oldfid); 11652bad8471SEric Van Hensbergen 1166531b1094SLatchesar Ionkov name = __getname(); 1167da977b2cSEric Van Hensbergen if (unlikely(!name)) { 1168da977b2cSEric Van Hensbergen retval = -ENOMEM; 1169da977b2cSEric Van Hensbergen goto clunk_fid; 1170da977b2cSEric Van Hensbergen } 11710710d36aSFlorin Malita 117216cce6d2SLatchesar Ionkov sprintf(name, "%d\n", oldfid->fid); 1173bd238fb4SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); 1174531b1094SLatchesar Ionkov __putname(name); 11752bad8471SEric Van Hensbergen 1176da977b2cSEric Van Hensbergen clunk_fid: 1177bd238fb4SLatchesar Ionkov p9_client_clunk(oldfid); 11782bad8471SEric Van Hensbergen return retval; 11792bad8471SEric Van Hensbergen } 11802bad8471SEric Van Hensbergen 11812bad8471SEric Van Hensbergen /** 11822bad8471SEric Van Hensbergen * v9fs_vfs_mknod - create a special file 11832bad8471SEric Van Hensbergen * @dir: inode destination for new link 11842bad8471SEric Van Hensbergen * @dentry: dentry for file 11852bad8471SEric Van Hensbergen * @mode: mode for creation 1186ee443996SEric Van Hensbergen * @rdev: device associated with special file 11872bad8471SEric Van Hensbergen * 11882bad8471SEric Van Hensbergen */ 11892bad8471SEric Van Hensbergen 11902bad8471SEric Van Hensbergen static int 11912bad8471SEric Van Hensbergen v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) 11922bad8471SEric Van Hensbergen { 1193531b1094SLatchesar Ionkov int retval; 1194531b1094SLatchesar Ionkov char *name; 11952bad8471SEric Van Hensbergen 1196bd238fb4SLatchesar Ionkov P9_DPRINTK(P9_DEBUG_VFS, 1197bd238fb4SLatchesar Ionkov " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, 11982bad8471SEric Van Hensbergen dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); 11992bad8471SEric Van Hensbergen 1200531b1094SLatchesar Ionkov if (!new_valid_dev(rdev)) 1201531b1094SLatchesar Ionkov return -EINVAL; 120273c592b9SEric Van Hensbergen 1203531b1094SLatchesar Ionkov name = __getname(); 1204c0291a05SEugene Teo if (!name) 1205c0291a05SEugene Teo return -ENOMEM; 12062bad8471SEric Van Hensbergen /* build extension */ 12072bad8471SEric Van Hensbergen if (S_ISBLK(mode)) 1208531b1094SLatchesar Ionkov sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); 12092bad8471SEric Van Hensbergen else if (S_ISCHR(mode)) 1210531b1094SLatchesar Ionkov sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); 121173c592b9SEric Van Hensbergen else if (S_ISFIFO(mode)) 1212531b1094SLatchesar Ionkov *name = 0; 12132bad8471SEric Van Hensbergen else { 1214531b1094SLatchesar Ionkov __putname(name); 1215531b1094SLatchesar Ionkov return -EINVAL; 12162bad8471SEric Van Hensbergen } 12172bad8471SEric Van Hensbergen 1218531b1094SLatchesar Ionkov retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); 1219531b1094SLatchesar Ionkov __putname(name); 12202bad8471SEric Van Hensbergen 12212bad8471SEric Van Hensbergen return retval; 12222bad8471SEric Van Hensbergen } 12232bad8471SEric Van Hensbergen 1224754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations_ext = { 12252bad8471SEric Van Hensbergen .create = v9fs_vfs_create, 12262bad8471SEric Van Hensbergen .lookup = v9fs_vfs_lookup, 12272bad8471SEric Van Hensbergen .symlink = v9fs_vfs_symlink, 12282bad8471SEric Van Hensbergen .link = v9fs_vfs_link, 12292bad8471SEric Van Hensbergen .unlink = v9fs_vfs_unlink, 12302bad8471SEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 12312bad8471SEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 12322bad8471SEric Van Hensbergen .mknod = v9fs_vfs_mknod, 12332bad8471SEric Van Hensbergen .rename = v9fs_vfs_rename, 12342bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 12352bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12362bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12372bad8471SEric Van Hensbergen }; 12382bad8471SEric Van Hensbergen 1239754661f1SArjan van de Ven static const struct inode_operations v9fs_dir_inode_operations = { 1240b501611aSEric Van Hensbergen .create = v9fs_vfs_create, 1241b501611aSEric Van Hensbergen .lookup = v9fs_vfs_lookup, 1242b501611aSEric Van Hensbergen .unlink = v9fs_vfs_unlink, 1243b501611aSEric Van Hensbergen .mkdir = v9fs_vfs_mkdir, 1244b501611aSEric Van Hensbergen .rmdir = v9fs_vfs_rmdir, 1245b501611aSEric Van Hensbergen .mknod = v9fs_vfs_mknod, 1246b501611aSEric Van Hensbergen .rename = v9fs_vfs_rename, 1247b501611aSEric Van Hensbergen .getattr = v9fs_vfs_getattr, 1248b501611aSEric Van Hensbergen .setattr = v9fs_vfs_setattr, 1249b501611aSEric Van Hensbergen }; 1250b501611aSEric Van Hensbergen 1251754661f1SArjan van de Ven static const struct inode_operations v9fs_file_inode_operations = { 12522bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12532bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12542bad8471SEric Van Hensbergen }; 12552bad8471SEric Van Hensbergen 1256754661f1SArjan van de Ven static const struct inode_operations v9fs_symlink_inode_operations = { 12572bad8471SEric Van Hensbergen .readlink = v9fs_vfs_readlink, 12582bad8471SEric Van Hensbergen .follow_link = v9fs_vfs_follow_link, 12592bad8471SEric Van Hensbergen .put_link = v9fs_vfs_put_link, 12602bad8471SEric Van Hensbergen .getattr = v9fs_vfs_getattr, 12612bad8471SEric Van Hensbergen .setattr = v9fs_vfs_setattr, 12622bad8471SEric Van Hensbergen }; 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